Synthetic Mechanism for Semiconductor Nanocrystals and Implications for their Single Particle Photophysics

半导体纳米晶的合成机理及其单粒子光物理意义

• 批准号: 1307254
• 负责人: Todd Krauss
• 金额: $ 41.5万
• 依托单位: University of Rochester
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1307254&HistoricalAwards=false
• 关键词: Synthetic; Mechanism; Semiconductor; Nanocrystals; Implications

Professor Todd D. Krauss of the University of Rochester is supported by the Macromolecular, Supramolecular, and Nanochemistry (MSN) Program in the Division of Chemistry to understand the fundamental mechanism behind the chemical synthesis of cadmium selenide (CdSe) quantum dots (QDs) and to characterize the relationship between QD surface chemistry and photophysical properties using state-of-the-art spectroscopic and microscopic techniques. It is expected that the relationship between surface chemistry, surface trapped charge, and photoluminescence properties for individual CdSe QDs will be determined. Despite over three decades of research, the fundamental chemical mechanism governing the synthesis of semiconductor QDs remains unknown. As a result of this research, rational procedures for the synthesis of QDs may be developed that are fundamentally scalable by several orders of magnitude to industrial scales, and that take place under much lower temperatures compatible with current chemical manufacturing. Large-scale synthesis of semiconductor QDs, especially those with bright and stable photoluminescence, may find broad use in biology, quantum optics, and optoelectronics. The proposed research also provides for the education and training of the next generation of physical chemists, inclusive of women and underrepresented minorities. Students supported by this project will organize and direct outreach and educational efforts in the local community through the Adopt-a-School program with the Rochester city school district, and participate in select "NanoDays" events at the Rochester Museum and Science Center.

罗彻斯特大学的Todd D. Krauss教授在化学系大分子、超分子和纳米化学（MSN）项目的支持下，了解硒化镉（CdSe）量子点（QDs）化学合成背后的基本机制，并利用最先进的光谱和微观技术表征量子点表面化学和光物理性质之间的关系。预计将确定单个CdSe量子点的表面化学、表面捕获电荷和光致发光性质之间的关系。尽管经过三十多年的研究，控制半导体量子点合成的基本化学机制仍然未知。作为这项研究的结果，可以开发出合理的量子点合成程序，这些程序可以从根本上扩展几个数量级到工业规模，并且可以在与当前化学制造相兼容的更低温度下进行。大规模合成半导体量子点，特别是那些具有明亮和稳定的光致发光的量子点，在生物学、量子光学和光电子学方面有广泛的应用。拟议的研究还规定了下一代物理化学家的教育和培训，包括妇女和代表性不足的少数民族。该项目支持的学生将通过与罗切斯特市学区合作的“收养学校”项目，在当地社区组织和指导推广和教育工作，并参加在罗切斯特博物馆和科学中心举办的“纳米日”活动。